The Phoenix Fuzz is a dual mode fuzz with an octave fuzz setting and a regular fuzz setting. It features controls for Texture and Volume. The Texture knob controls the high frequencies, as well as the octave, compression and “sag”, and the Volume knob controls the overall output. There is no gain control; this is a dynamic circuit that allows you to control the gain with the volume on your guitar. It runs on a standard Boss-style 9 volt AC adapter jack, no battery.